Combination-lock



J. NASLUND.

' CDMBiNATION LOCK. APPLICATION EILED APRJS, 1920.

Patented June 29, 1920.

PATENT OFFICE.

JONAS NAsLUND, or RIMBO, SWEDEN.

COMBINATION -LOGK.

Specification of Letters Patent.

Patented June 29,1920.

Application filed April 15, 1920. Serial No. 374,169.

To all whom it may concern:

Be it known that I, 'JoNAs Ni'isLUND, subject of the King of Sweden,residing at Rimbo, in the Kingdom of Sweden, have invented certain newand useful Improvements in Combination-Locks, of which the following isa Specification. Y

My present invention has for its object a combination-lock which can beopened only if the person operating the same knows the necessarycombination of mutual positions of a number of rotary rings. knowncombination locks have beenbased on'certain combinations of figures orletters which is, however, objectionable dueto the impossibility ofopening such locks in darkness orat dim light.

According to my present invention a number of rings are rotatabl mountedon a core and the main feature 0 the invention consists in this thateach ring is provided with a, handle or projection and that all ringsare located within a casing provided with a longitudinal slot throughwhich said projections extend. For opening the lock it is necessary toplace the projections of the different rings in certain positions whichcorrespond to the combination being characteristic for the lock. Formaking it easier to open the lock in darkness some or at least one ofthe projections can be of different length than the other ones.

Other features of my invention will be made clear in the followingdescription of some forms of embodiment shown on the accompanyingdrawing.

Figure 1 is a side view of the invention having the shape of thepadlock. Fig, 2 is an end view of the same. Fig. 3 is a section alongthe line II-II of Fig. 1. Figs. 410 show different details. Figs. 11 and12 show different examples of combinations. Fig. 13 shows amodification.

The cover of the lock is designated by 1 and 2 is a longitudinal slot inthe same adapted to receive the shackle 3. Within the cover is located acylindrical core 4, made for instance of wood, and provided on itscircumference with guides for a number of locking devices 5 rotatablylocated on the core and each provided with a handle or projection 6extending through a longitudinal slot 7 provided in the cover. Each ofthe said ring shaped devices is provided with an opening 8 which on thedifferent devices Hitherto or someof them is located at different placeswith relation to the handle 6 (see Figs. 4 and 5). All the devices canbe placed elther in the position shown with full lines or in theposition shown with dotted lines in Fig. 3 or in the middle positionbetweensaid end positions. In a certain position of the differentdevices corresponding to the opening position the openings 8 are infront of the opening 2 in the cover so that the shackle- 3 can beinserted into a longitudinal slot 9 in the core 4, while, when one orseveral of the devices occupy another position, one

or. several of the openings are displaced relatively to the other sothat one or several of the difi'erent rings then go through the opening10 in the shackle so as to keep the same secured to the lock. Theshorter curved end of the shackle is in looking position introduced intoa groove 11 provided in the end surface of the cover, see Figs. 1 and 2.Fig. 9 shows the shackle in elevation and Fig. 10 is a section alongline IIIIII in Fig. 9.

The guides for the locking devices 5 may consist either of grooves 12provided in the circumference of the core (Fig. 6) or of distance pieces13 located on said circumference (Figs. 7 and 8).

Fig. 11 shows an example of a certain scheme of combination, the pointsindicating the handles 6. If there are ten locking devices numbered 1,2, 3, etc., it is required in the cited example that the handles 2, 5and 8 are placed against the one edge of the longitudinal slot 7 and theother ones against the other edge of the same in order to make possiblethe opening of the lock. The key of the lock is thus according to thesaid example 258. It is obvious that a very great number of combinationsare possible. The openings 8 in the rings are preferably located in sucha manner that they are in locking position when the handles 6 are in astraight line.

In order to make the opening of the look more complicated it is alsopossible to have, besides the above mentioned end positions,

- also a middle position for some of the hanwhere two members A and Bare tobe locked together, the shackle 3 being thenfastened to the onemember A and the cover 1 to the other member B.

I claim: 1

1. A combination lock including a cylindrical casing having alongitudinal slot, a core mounted within the casing provided with alongitudinal groove, a shackle having a longitudinal slotted extensionslidably arranged in the groove'in the core, and a plurality ofring-like elements rotatably mounted on the core within the casinghaving portions cut away so that the remain,-

ing portions of the ring-like elements are of various sizes and designedfor engagement with the slotted extension of the shackle for locking theshackle within the casing, and means for facilitating the turning of thering-like elements so as to disengage fthering-like elements from theslotted extension to permit of the release of a the shackle.

2. A combination lock comprising a cylindrical casing provided with alongitudinal slot, a core located within the casing provided with aplurality of annular grooves on its outer surface and with alongitudinal groove'opening at its outer surface for intersecting theannular grooves, a

shackle havinga"longitudinally slotted extension slidably received"within the longitudinal groove within the core, a plurality of ring-likeelements rotatably mounted in the annular grooves and having a portioncut away to form-an opening, a pro ect1on 011 each ring-like elementextending through the slot and the projections being located atdifferent pointson the ring-like elements so that when shifted in onedirection portions of the elements adjacent'the openings will be engagedwith the slot in the extension for the locking of the shackle or. whenshifted in another direction the openings in the ring-like elements willbe registered so that the ends thereof will lie on opposite sides of thegroove to'permit-of the release of the shackle.

In testimony whereof I'have afiiXed my signature in the presence of twowitnesses.

\Vitnesses STURE GIDINGER, S. HonNssoN.

JONAS NASLUND.

